<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
    <nav>
        <a href="index.html">首页</a>
        <a href="about.html">关于我们</a>
    </nav>
    <h1>ToDo List</h1>
    <input id="todo_input" type="text" placeholder="请输入任务"></input>
    <button id="add_btn">添加任务</button>
    <ul id="list"></ul>
</body>
</html>